embassy in benghazi, killing a u.s. ambassador from the bay area. danielle lee has been live for us. she joins us from capitol hill with how lawmakers are responding. >> reporter: lawmakers are condemning not only the violence but also this online video that prompted it all. this is all in the hope of calming this outrage before more people get hurt. hundreds of yemeni protesters turned on police after storming the u.s. embassy here. the aggression against america is spreading throughout the middle east, in egypt, libya, iran and iraq. two days ago protesters set fire to the u.s. embassy in benghazi. that attack killed u.s. ambassador chris stevens and three other americans. john mccain says he believes the attacks in benghazi were organized and that ambassador stevens was targeted. >> i think the way this attack was carried out clearly indicate that's the case. >> reporter: the u.s. government is now working with libya to identify the people responsible for that attack. but nbc's michael leiter suggests bringing the perpetrator to justice may not b